Apparatus for disintegrating fibrous material used in the manufacture of paper-pulp.



W. H. STOBIE.

PAPER PULP. 7

APPLICATION FILED APBHZS, 1912. RENEWED P3120, 1913.

- Patented May 20, 1913 WITNESSES W %J% 'u'u uuguuuu INVENTOR I I Allorney Arrm'rus mamsmtemme FIIBBQUS MATERIAL usnn or PAPER-PULP.

' To all whom it may concern:

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,, UNITED sTATEs rATEnToFFIoE;

or wn'rnnviun, nmz, nss mno'n To 'Honnmeswontma WHITNEY commit," or nosrou, ms's nofiusnr'rs.

speuac non o1 Letterslatent.

In rim mumcrunn Application filed April as, 1912, Serial in. 093,479. Renewed February 20, 1913. 8eril1No.749,728.

t Beit lmown that I, WILLIAM H. STOBIE,

-a citizen'of the United States, residing at- Waterville, in the county of Kennebec and State of Maine, have invented certain new and useful Improvements in Apparatus for Disintegrating Fibrous Material Used in the Manufacture of Paper-Pulp and I do hereby declare the followin to be a full, clear, and exact description 0 the invention, such as will enable others skilled in the art to which pulp, and is designed particularly as an improvement on the construction disclosed in my application Serial No. 693,477 filed April 7 The object of this invention is to provide a target against which the pulp stock is projected, that may. be turned so as to present a continuously changing surface to the action of the jet, and it consists broadly in a vat, a roll or cylinder therein having a serrated or roughened surface, and a system of pipes andv a pump for taking-the stock from the vat and projecting it in the form of a jet against the surface of the roll or cylinder whereby the fibers are separated without breaking or cutting them.

In the accompanying drawings, Figure 1 is a view in plan of an apparatus embodying my invention and Fig. 2 is a view in vertical section through the tank or vat.

1 represents a vat or tank to contain the paper stock which has been previously mixed with the proper proportion of water to reduce it to a consistency where it can be readily pumped and conveyed through pipes, and 2 is a roller 'or cylindrical target mounted vertically within the vat, and adapted to rotate. This cylinder or target is provided with serrations which may extend in the at its ends so as to rotate. 'tated by the impact of the jet projected against it as will be hereinafter explained,v or it may be provided with a gear 3, by

direction of the length of the cylinder or circumferentially; or both, and is mounted It may be rowhich it may be rotated positively either with the jet or in a reverse direction, by a motorhor gearing leading from a suitable source of power.

Leading from the bottom of the tank 1,

tothepump 4 is the pipe 5, and leading rammed May 20, 1913.

from the pump to the tank, is the discharge pipe or pipes 6, each terminating within the-tank, in a nozzle 7. In the present incylinder at opposite sides of its axis. With this arrangement each jet will counteract any rotary tendency of the other, but if dc sired the position of one jet say, 7", can be changed as shown in dotted lines in Fig. 1 so that both will point in opposite directions and thus tend to rotate the target unless it be restrained by suitable braking devices. With this arrangement, the impingement of the jets against the cylinder will rotate the latter unless it be restrained by suitable braking devices, but if desired.

a positive rotation may be imparted to the cylinder at any desired speed, in either direction, by the gearing previously referred to. The pulp stock strikes the periphery of the-cylinder at an angle and falls back into the tank, and is repassed through the pipes by the pump, and against the cylinder until the stock has been reduced to the proper consistency; If desired I may provide the.

desired condition, I may project the stock against the serrated cylinder and then pass it on to a reducing engine or other apparatus employed in the paper making process. The action of the serrations or teeth on the stock projected thereagainst, isto divide or separate the fiberswithout breaking or cutting them, thereby fitting the stock so that it felts better on the machine, and produces the desired fineness without making the stock slow which invariably results from long beating in a regular engine.

It is evident that many slight changes departing from the spirit and scope of my invention. Hence I would have it understood that I do not wish to confine myself.

to the exact construction and arrangement of parts shown and described, but

Having fully described my invention what I claim as new and desire to secure by Letters-Patent, is

1. In apparatus for disintegrating and dividing fibrous matter, in the formation of pulp, the combination of a cylinder having a grooved or roughened surface and mounted to turn, and means for discharging a stream of pulp stock tangentially against said roughened surface.

3. In apparatus for disinte ating and dividing fibrous matter in the ormation of pulp stock, the combination of a. grooved or roughened cylinder, mounted to turn, gearing for turning same and means for ischarging a stream of pulp tangentially against the cylinder.

4. In apparatus for disintegrating and dividing fibrous matter in the formation of pulp stock, the combination of a tank, a grooved or roughened cylinder located within the tank and mounted to turn, means for continuouslv withdrawin the pulp from the tank and discharging it in the form of a jet tangentially against the cylinder, and an agitator located within the tank below the cylinder.

Intestimony whereof, I have signed this specification in the presence of two subscribing witnesses. I

WILLIAM H. STOBIE. Witnesses: PERCY M. CRAM,

JOSEPH R. Goonwm. I 

